Saito 120 timing question  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Saito 120 timing question
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Saito 120 timing question - 2/28/2007 6:47:26 PM   
Zephan



Posts: 59
Joined: 10/29/2003
From: Lompoc, CA, USA
Status: offline 		I made the mistake of taking apart my saito 120 four-cycle engine. I'm not sure how to determine the proper orientation for the cam gear (the timing). Does anyone know how to get the proper position for the cam gear? Does anyone have a Saito 120S that they could look at the position of the cam gear at, say, top-dead-center?
       Post #: 1

RE: Saito 120 timing question - 2/28/2007 7:59:46 PM   
w8ye



Posts: 19025
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		With the piston at top dead center, the mark on the cam goes straight down towards the crankshaft

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Original AMA #31261

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RE: Saito 120 timing question - 2/28/2007 10:17:21 PM   
Zephan



Posts: 59
Joined: 10/29/2003
From: Lompoc, CA, USA
Status: offline 		I did not find a mark on the cam. Where is the mark? On the gear? Which tooth? Is it between the two cam lobes? Oppisite that?

(in reply to w8ye)
       Post #: 3

RE: Saito 120 timing question - 2/28/2007 10:34:33 PM   
wcmorrison



Posts: 780
Joined: 10/2/2002
From: Weatherford, TX, USA
Status: offline 		Send as "private Message" to William Robison. He will tell you how to do it.

Cheers,

Chip

(in reply to Zephan)
       Post #: 4

RE: Saito 120 timing question - 2/28/2007 10:39:36 PM   
w8ye



Posts: 19025
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		The mark is near the edge of the gear teeth on the front of the gear. It is just a dimple.

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

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RE: Saito 120 timing question - 2/28/2007 11:35:22 PM   
Zephan



Posts: 59
Joined: 10/29/2003
From: Lompoc, CA, USA
Status: offline 		Thanks... I will look for the mark again when I get home.

(in reply to w8ye)
       Post #: 6

RE: Saito 120 timing question - 2/28/2007 11:37:15 PM   
w8ye



Posts: 19025
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		You will have to wipe the sludge off the front of the gear and look carefully for a little dimple

Here is a copy of the manual . . . .

http://h1071118.hobbyshopnow.com/ProdInfo/Files/Large_Single_Cylinder_Manual.pdf

< Message edited by w8ye -- 2/28/2007 11:38:53 PM >

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to Zephan)
       Post #: 7

RE: Saito 120 timing question - 2/28/2007 11:42:42 PM   
Zephan



Posts: 59
Joined: 10/29/2003
From: Lompoc, CA, USA
Status: offline 		Thanks for the link to the manual, but already had it. Is there info that I missed in there on the timing?

(in reply to w8ye)
       Post #: 8

RE: Saito 120 timing question - 2/28/2007 11:49:15 PM   
w8ye



Posts: 19025
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		Yes, its in there I'll look to see what page?

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

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       Post #: 9

RE: Saito 120 timing question - 2/28/2007 11:54:44 PM   
w8ye



Posts: 19025
Joined: 12/11/2001
From: Taylortown, OH, USA
Status: online 		It's on page 8 of the current one. There's a picture on the left colum about half way down

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Attended the CutFinger Institute of DirtNap University for years but never did graduate....

Club Saito Member #7
Original AMA #31261

(in reply to w8ye)
       Post #: 10

RE: Saito 120 timing question - 3/1/2007 12:28:11 AM   
Zephan



Posts: 59
Joined: 10/29/2003
From: Lompoc, CA, USA
Status: offline 		Found it... Thanks.

(in reply to w8ye)
       Post #: 11

RE: Saito 120 timing question - 4/4/2008 1:54:22 AM   
mofosheee


 

Posts: 146
Joined: 9/26/2005
From: napa, CA, USA
Status: offline 		Dear w8ye:

I'm OK with the piston at TDC and the cam dimple pointing towards 6 O'clock, but upon reassembly of my Saito 125, it occurred to me that it is quite simple to be off a tooth and that lining up these components seems to be a judgement call.

While it is still on the bench and prior to running, is there an alternative method for confirming valve timing? Valve Adjustment?

(in reply to w8ye)
       Post #: 12

RE: Saito 120 timing question - 4/4/2008 3:17:51 PM   
blw



Posts: 4680
Joined: 3/15/2004
From: Auburn, AL, USA
Status: offline 		You can stick a knife blade in under the cam cover to pin the cam while reassembling.

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       Post #: 13

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